Chusetts



2 Sheets-Sheet 1 G. A. 81; E. G. WATKINS (N0 ModBl.)

ADJUSTABLE CHAIR SUPPORT.

Patented Feb. 18, 1896.

INVENTDRS! \XATNESSESC (No Model.) 2 Sheets-Sheet 2. G. A. & E. G. WATKINS ADJUSTABLE CHAIR SUPPORT. No. 555,029. Patented Feb. 18, 1896.

\X/ITN 555:5: SM

UNITED STATES PATENT Grin-cs.

GARDNER A. \VATKIN S AND EDVARD G. WVATKINS, OF GARDNER, MASSA- CIIUSETTS, ASSIGNORS TO HEYW OOD BROTHERS & CO., OF SAME PLACE.

ADJUSTABLE CHAIR-SUPPO RT.

SPECIFICATION forming part of Letters Patent No. 555,029, dated February 18, 1896.

Application filed August 17, 1895- Serial No. 559,642. (No model.)

To all whom it may concern:

Beit known that we, GARDNER A. \V ATKINS and EDWARD G. WVATKINS, of Gardner, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Adjustable Chair-S upports, of which thefollowing is a specification.

This invention relates to an improvement in adjustable chair-supports; and it consists in certain novel features of construction and arrangement of parts, which will be hereinafter fully described in the specification, clearly illustrated in the drawings, and particularly pointed out in the claims.

Reference is to be had to the accompanying drawings and the characters marked thereon, which form a part of this specification, like characters designating like parts or features, as the case be, wherever they occur.

In the drawings, Figure 1 represents a top plan view of a chair-support constructed in accordance with our invention, the frame for the seat-panel being indicated in dotted lines. Fig. 2 represents in front elevation a chair equipped with our improved support. Fig. 3 represents a side elevation thereof. Fig. 4 represents a detail View of a modified form of the front arm of the spider. Fig. 5 represents a detail view of the lug. Fig. 6 represents a detail view of the ends of one of the side arms of the spider.

a represents the legs and b the frame for the seat-panel. These may be and preferably are of the ordinary construction and arrangement. The legs a are secured in a wellknown way with a nut a. At its upper end the spindle a, is smooth and is arranged in a hub f of a spider f, the spider being free to turn on said spindle without affecting the latter, while the loose end of said spindle is arranged in the nut a. ranged in said hub in a position to impinge upon the part of the spindle within the hub f, in order to lock the hub and spindle together.

f f represent the front and rear arms, respectively, of the spider, andupon which the front and rear portions of the frame 6 rest or strike.

f represents the side arms of the spider. These arms are formed with apertured eX- f is a set-screw artremities f, having a rib f upon the end thereof. These extremities f are preferably raised somewhat from the plane of the arms, in order to give room for the tension-rods and the bar. The extremities f 6 are also preferably formed with one or more depressions f in which the tension-rods rest and by which they are in a measure retained in place. These arms are also formed with a member f constructed as a bearing for the ends of a bar f This bar at its ends is formed on one side with a bearing-surface to engage the members f and on the opposite side with flanges f that serve as bearings for the ends h of the tension-rods 72. This bar f is also formed with a slotted arc-shaped member f, in which is arranged the smooth part of a set-screw f, the screw-threaded portion of which is arranged in one of the arms it represents tension-rods, each having one of its ends bent, as at h, and arranged under the bearings f 11 of the bar. The other ends, 71 of said rods are passed through the extensions f of the arms f and rest in the depressions f 0" represents a lug formed with apertured ears r for attachment to the frame of the chair-seat and also with a depression r terminating in two openings r r separated by a bar W. This lug, upon one side, is formed with a groove 1* by depending ribs 1. The lugs are arranged upon the extremities f, the ribs f engaging the groove 0", and the ends if of the rods not only pass through the extremities f, but also through the openings 1' r of the lug over the bar r and are bent to rest against the bottom of the lug, as shown.

Referring to Fig. 4, f represents the top of the spindle f the set-screw, a the spindle, and f a modified form for the front arm of the spider. This is composed of the lug f integral with the spider, to which is pivoted an arm f by means of a pintle f the end of the arm f designed to be secured to the chair-seat in any desired way, as by an aperture f and the passage of a screw there through. The particular construction by which the parts and f are joined together is immaterial, provided the hinge connection is a loose one.

One of the objections brought against tilting-chairs is that the fingers are sometimes caught between the front of the chair and the front end of the front arm as the chair is tilted forward. This objection we overcome by forming a hinged front arm and securing the free end of the arm to the chair, so that it moves with it.

Having thus explained the nature of our invention and described a way of constructing and using the same, though without attempting to set forth all of the forms in which it may be made or all of the modes of its use, what we claim, and desire to secure by Letters Patent, is

1. A chair-support, comprising in its construction a seat, a spider having side arms formed with apertured ends, parts upon said arms formed with a depression, a bar having its ends loosely arranged in said depression, apertured lugs arranged upon the said ends of said side arms, and constructed for attachment to the chair-seat, rods having one of their ends arranged in said apertured ends, and confined in said lugs, and their other ends arranged to engage said bar to press said bar against said parts, and means for turning said bar to Vary the tension upon said rods, substantially as and for the purpose set forth.

2. A chair-support comprising in its construction a spider, side arms upon said spider formed with bearings f, a bar having its ends arranged in said bearings and formed with an arc-shaped member f, lugs constructed for attachment to a chair-seat and for connection with the ends of said arms, tension-rods having one of their ends arranged beneath a member on said bar, and their other ends pivotally connecting said lugs and the ends of said arms, and a set-screw mounted in said arc-shaped member and arranged in one of said arms, substantially as and for the purpose set forth.

3. A spider comprising in its construction a hub, and a front arm formed in two pieces hinged together, the free end of said arm being adapted to be connected to a chair-seat frame, substantially as and for the purpose set forth.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, this 2d day of August, A. D. 1895.

GARDNER A. \VATKINS. EDYVARD G. \VATKTNS.

\Vitnesses:

DAVID R. COLLIER, DESRIE A. STowELL. 

